How Long Does the Interlogix Simon XT Backup Battery Last?

The Interlogix Simon XT backup battery lasts about two to three years. After that period of time, the backup battery for the system will need to be replaced. This is done by opening up the panel, disconnecting the old battery, connecting the new battery and then closing the panel.

The Interlogix Simon XT System will let you know when the backup battery for the system is low. When this occurs, it is time to replace the battery. If you need to replace the backup battery for your Simon XT System, complete the following steps:

1. Open the panel. First, make sure the system is disarmed. Then, locate the screw on the top of the panel. Using a screw driver, remove the screw and put it somewhere for safe keeping. Next, push down on the two tabs that are found on top of the panel. Once the tabs are pushed in, you should be able to pull the panel forward and away from its back mounting plate. This will give you access to the inside of the panel.

2. Remove the old battery. You can identify the backup battery as a large black box that receives two incoming power wires. One wire connections to the positive (+) terminal, and the other connects to the negative (-) terminal. Release the tabs holding the battery in place, and pull the battery away from the system. Then disconnect the two wires attached to the battery.

3. Connect the new battery. Take the fresh battery and connect the power wires to its terminals. The power wires should be connected in the same way that they were connected to the old battery. In most cases, the red wire will go to positive (+), and the black wire will go to negative (-). Once the wires are attached, secure the new battery in the tabs so that it is kept securely in place.

4. Close the panel. Push the panel onto its back cover, and make sure that the tabs on top click into place. The panel should be held securely in place. For added security, reapply the screw on the top of the panel. The new battery may need to charge for up to 24 hours before the low battery warning will clear from the display.

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